U.S. Secretary of State John Kerry speaks during a press conference in front of Palais Coburg where the Iran nuclear talks take place http://www.uashoesforsale.com/mens-air-jordan-1-retro-high-og-wheat.html , in Vienna, Austria, July 9, 2015. John Kerry on Thursday said some of the tough issues remain unresolved in the ongoing nuclear talks here, saying hard decisions must be taken very soon. (XinhuaQian Yi) VIENNA, July 9 (Xinhua) -- U.S. Secretary of State John Kerry said on Thursday some of the tough issues remain unresolved in the ongoing Iranian nuclear talks in Vienna http://www.uashoesforsale.com/mens-air-jordan-32-xxxii-low-bred.html , saying hard decisions must be taken very soon, warning the United States could walk away from the negotiation table if tough decisions are not made.

As the deadline of the ongoing nuclear talks approaching, difficult choices are needed to be made by sides involved in the talks for a comprehensive Iranian nuclear deal.

"Some of the tough issues remain unresolved," Kerry said, adding "We know that difficult decision don't become easier over time,those decisions must be taken very soon."

Kerry warned the United States could walk away from the negotiation room if "tough decisions" could not be made.

A diplomatic source told Xinhua the accord "could be very hard to be reached" by the 6 a.m., July 10 deadline, but the clarification of Iran's past suspected nuclear activities (so called possible military dimensions or PMDs) is "likely to have been done," the source said.

It's still unclear how long would the nuclear talks last in the Palais Coburg hotel, as some gaps remain unresolved.

Responding to reporters, Iranian Foreign Minister Mohammad Javad Zarif said he would stay in Vienna as long as necessary.

Merchant ships plying along the maritime Silk Road brought prosperity to China and its neighboring countries between 7th and 14th centuries, inspiring the proposal for building a 21st century maritime Silk Road raised by Chinese President Xi Jinping in 2013.

The initiative has prioritized infrastructure construction for better connectivity, good news for the region's booming tourism.

Asian countries rank the most popular destinations for China's outbound tourists. They were the destination for 90 percent of the 100 million overseas trips made by Chinese in the first 11 months of 2014.

There are more than 1,000 flights between China and ASEAN countries every week, with bargain airlines like AirAsia and Tigerair opening more multinational flights to China's smaller cities to explore their unsaturated air market.

Cruise tours have become the new fashion. Industry observers say China has become a central point in Asia's cruise tours, with the anticipation that over 1 million Chinese will take such tours in 2015.

Land transport services remain scarce in the region. China has only two cross-border rail lines to Southeast Asian countries Mens Air Jordan 1 Retro High OG Los Primeros , both to Vietnam, despite high demands from both the business and tourist sectors.

A traffic official with Guangxi, which borders Vietnam, said backpackers have crowded a passenger train that opened in 2009 to link Nanning, capital of Guangxi and Vietnam's Hanoi.